-97.1% is the change from 449 to 13
Calculation steps:
[( 13 - 449 ) ÷ 449] x 100 = -97.1%
Formula
Percentage change = [(13 - 449) / 449] x 100
Subtract the new number by the original number
13 - 449 = -436
-436 ÷ 449 = -0.9710467706013363
-0.9710467706013363 x 100 = -97.1%